these 2 derivations will be built:
  /nix/store/acbq4qixr0w3fnfw0hlip68iqpxrqnvj-nixos-test-driver-zerotier.drv
  /nix/store/8a4k5vp329jvn3bcx7v99zrzihwkhkm1-vm-test-run-zerotier.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy